Cutting mechanism.



PATBNTED APR. 24, 1906.

C. F. SMITH. CUTTING MECHANISM.

APPLICATION FILED APB.. 1, 1905.

2 SHEETS-SHEET l.

.I l. 1 .A ....a1,....... A 1. 414:11/

PVz'z eases: [nvenof': Charles E Smih @Mmm fzor/z eg We@ l :164.GUT'SINo. 818,713. PATENTED APR. 24, 1906. C. F. SMITH.

CUTTING MECHANISM.

APPLICATION FILED APRA, 1905.

2 SHEETS-SHEBT 2,

I rwelzal" Charles E Sml'f/L dito/we y U NITED STATES PATENT OFFICE.

CHARLES r. SMITH, OF BRIDCEPORT, CONNECTICUT, ASSIGNOR To CON- TINRNTALPAPER RAC COMPANY, A CORPORATION vOP MAINE.

CUTTING. MEoHANlsM.

Specification of Iietters Patent.

Patented April 24, 1906.

To all whom it may concern:

Be it known that I, CHARLES F. SMITH, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inCutting Mechanism, of which the following is a specifiation. y

This invention relates to cutting mechanism,`particularly to that classof such mechanism as is employed for severing a continuous web of paperinto blanks or sections of uniform and predetermined length.

In the drawings accompanying this speciiication is illustrated a machineembodyin one form and which may be the preferre form of my invention,and wherein- Figure l is a plan view thereof. Fig. 2 is a side elevationcorresponding with Fig. 1 and with side frame 2 omitted to better showthose parts which would otherwise be obscured. Fig. 3 is a plan view offloat F, and Fig. 4 is a detailed view ofthe cutting-blades.

My invention is peculiarly applicable in connection with paper-b agmachines in which it is desired to sever a continuous paper tube intolengths suitable for bag-blanks. Such paper tubing may be a simple flattube, or said tube may be provided with an inwardlyfolded tuck in eachside thereof.

My improved mechanism is also adapted for severing continuous webs,tubular or otherwise, having other forms of cross-section, or forsevering flat continuous single, double, or multiple ply webs and all ofthe plies of which may pass above the float or a part above and a artbelow.

It is particular y desirable in severing paper tubing into bag-blanksections to provide at the forward end thereof a difference in length ofthe upper andlower plies, so that one ply may be gripped by the ba-bottomforming mechanism without invo ving the other ply. Preferably theupper ply of the tubular blank is cut back, whereby the lower ply isallowed to project in front thereof. This provides at the other end ofthe blank, and which other end is later the mouth ofthe finished bag, arearwardly-extending lip on the upper ply, whereby the bag-mouth may beconveniently opened for use. My improved machine provides for thesevering of paper tubing and for the formation in severing on the endsof each Section thereof of projecting portions, as described.

The machine illustrated in the drawings comprises side frames 2 3, inwhich may be supported the various parts of the mechanism. These sideframes may be secured in suitable relation to each other by tie-frames 45, extending therebetween and fastened at their ends, respectively, toSaid side frames by bolts, as 6.

At F in the left-hand or entering end of the machine is shown thedelivery end of some suitable tube-forming mechanism. This member F isin the nature of a float and is of suitable Width to ass through anopening between feed rol s 7 8. This opening is formed byoppOsitely-disposed reduced portions 9 in said rolls. Float F lieswithin and is surrounded by the paper tube which it is desired to sever.If said tube is provided with inwardly-folded tucks, said tucks arepreferably disposed below the float.

My improved machine is provided with two pairs of feed-rolls 7 8 and 1112, respectively, and which two pairs of rolls are driven at the samesurface Speed from pulley 10 by means of suitable gearin This gearing isas follows'. Turning free y upon stud 13, which stu'd projects outwardlyfrom frame 3, is driving-gear 14. Pulley 10 is fast to said gear andturns with it about stud 13. Rolls 7 8 are supported for revolution u onshafts 15 16, res ectively, and which sha s are provided wit suitablebearings in brackets 18 19, upstanding from frames 2 3, respectively.Shafts 15 16 are provided with intermeshing gears 21 22, respectively,and lower gear 22 is engaged by driving-gear 14. Upstanding andinreaching from frame 3 is bracket 17, and in which bracket are formedbearings for three shafts. One of these three shafts 2() has fixed onits outboard end gear 23, meshing on the one side with driving-gear14and on the other side with idle gear 24 on stud 26. Feed-rolls 11 12are mounted for revolution on shafts 27 28, respectively, and whichshafts are provided with suitable bearings in brackets 30 31, upstandingfrom frames 2 3, respectively. Shafts 27 28 are provided withintermeshing gears 33 34, respectively, the lowerone 34 of which mesheswith idle gear 24. By Y the train of gears just described the two setsof feed-rolls 7 8 and 11 12, respectively, may

be driven to feed the web of paper in the dilreotion of arrow A.

On the inboard end of shaft 2O and located about midway of side frames 23 is roll 25. Said roll is keyed to said shaft and turns therewith asdriven by gear 23 on the outboard end of said shaft 20. In one side ofsaid roll, reachinor inwardly from the periphery thereof and located,preferably, oblique to the radius at its mouth, is a slot 29 forconvenience throughout the length of said roll and in the presentinstance parallel to the axis thereof. In said slot is secured knife 32,having a serrated edge 35 projecting slightly above the periphery of theroll. The teeth 47 of said serrated edge are preferably V- sha ed, butmay be of any other suitable pro -e. The forward end of float F issupported by said roll and is provided with a series .of contiguousslots or grooves 36, through which the teeth 47 of serrated edge 35 ofblade 32 sweep in their revolution about shaft 20. Said grooves lielengthwise of float F, and the series extends entirely across saidfloat. These grooves are spaced the same distance apart as the teeth ofblade 32, so that during the time of coaction of float F and blade 32each slot has a tooth in engagement therewith, whereby a continuouscuttino-line is maintained across the whole wi th of float F. Said slotsor grooves 36 approximately conform in rofile of crosssection to theprofile of teet 47 and in profile of longitudinal section approximatelyto the arc described by said teeth durin their engagement with saidslots. Preferab y said slots conform in profile of longitudinal sectionto an arc of a circle having a slightlygreater radius than that of teeth47, whereby 1n operation said teeth do not commence to cut the paperuntil after those teeth have entered sald grooves a short distance,whereby said cutting is performed gradually, or said grooves may be ofreater length, 1f desired.

Above float Fa istance equal to the distance of shaft 20 below saidfloat is shaft 50. Said shaft 50 has mounted thereon carrier 37 forblade 38. Said carrier is preferably adjustably secured to said shaft,as by clampscrews 39. Blade 38 may be secured to carrier 37 by anysuitable means, such as screws 41. Said blade may be a flat platesimilar to blade 32; but in the present instance said blade 38 isillustrated as having a transverse profile curved rearwardly toward themiddle thereof, and the seat therefor on carrier 37 is curved tocorrespond. Blade 38 is also rovided with a serrated edge 42, whose teet43 are of the same character as teeth 47 of blade 32 and are spaced forengagement with grooves 46 in the upper side of float F as teeth 47 ofblade 32 enga e with grooves 36 on the under side of said oat.Alsogrooves 46 are of the same character as grooves 36.

l-p y Roll-shaft 20 also has fixed thereto ear 44, meshing with equalgear 45 on roll-s aft 50, whereby blades 32 38 are caused to rotate atthe same speed. Also shafts 20 50 are preferably located out of onevertical plane, so that grooves 36 46 will not out into each other, andthereby unduly weaken float F. Gear 23 has a pitch radius somewhat lessthan the radius of the serrated edge 35 of blade 32 or than the equalradius of serrated edge 42 of blade 38, whereby said edges are caused totravel slightly faster than the surface speed of feed-rolls 7 8 or 1112. Near shaft 50 and between it and roll 11 is roll 48, fixed to shaft49, and which shaft is mounted for rotation in bracket 17. On therearward end of shaft 49 is fixed gear 51, and which gear is driven fromgear 24 through idle gear 52. Said gearing-is so proportioned that roll48 is driven at the same surface s eed as rolls 7 8 and 11 12 and isprovided to old float F down in position for engagement with blade32,`or, if desired, carrier 37 may be in the form of a roll similar toroll 25, and'in that case said carrier 37 would be eflicient to holdfloat F down against any upward pressure of blade or knife 32. Roll 48could thus be dispensed with, or knife 32 may be mounted in a carriersimilar to carrier`37 and oat F sustained in roper alinement byindependent rolls or ot erwise. In case it is desired to sever acontinuous web traveling on the u per side only of float F said floatmay be 1n the nature of a permanent table and supported, for instance,as table 54 is supported.

On shaft 53 is supported table 54. Said table is bent downward at 55 toallow the advancing tubular web of paper to pass thereover. Said tableis mortised at 56 to allow roll 12 to project upwardly therethrough forcoaction with roll 11.

Rolls 11 12 are provided with a take-up device for increasmg the speedduring a small increment of time of that portion of the tubular web ofpa er in advance of the portions thereof whic have been acted upon byblades 32 38 and whereby if said blades have failed to wholly separatethe web said takeup device will complete that se aration. Said take-updevice comprises a ri 57, extendin across one of the rolls, as 11, andparallel with the axis thereof. Said rib projects beyond the peripheryof said roll and engages with a com lementary groove 58 in ro l 12. Saidrib an groove may be formed integral with the rolls, respectively, orfor convenience may be fashioned in separate pieces and inserted in saidrolls, as shown at 59 60, respectively.

The operation of my improved mechanism is as follows: Suitable papertubing either with or without an inwardly-folded tuck in each sidethereof being delivered around float F and into the grip of rolls 7 8,the machine is -loo NCHING SHEETS & BARS,

ting, Machines,

started in the direction indicated by the arrow on pulley 10. If tuckedtubinr is used, said tubing may be fed into the machine with the tuckseither above or below the oat; but when my improved mechanism is used inconnection with paper-bag machinery it is customary and deslrable tofeed the tucks under the float. The tubing is then fed forwardly aboutfloat F, as indicated by arrow ro A, until the revolution of blade 38brings those teeth 43 nearest the opposite sides of said blade intocontact with that ply of the paper tube above the float. These teeththereupon force the paper under them down into those grooves 46corresponding with the end teeth of blade 38. Said blade then continuesits revolution in an anticlockwise direction, and-said`end teethsuccessfullyvper: forate and fully severfth'elupegply Lofwthe zo tube atits edges/-, Then working inwardly the succ'ess'iv'eteeth of blade 38repeat the operation on successive portions of the upper ply of thepaper tube until that upper ply is severed throughout the whole widththereof. Any downward pressure that may be exerted by blade 38 againstthe ioat is sustained by the periphery of roll 25, which roll isrevolving with a surface speed equal or about equal to that of thepaper. AtI about the time of the completion of the severance of theupper ply of the paper tubeblade 32 asses into engagement with the lowerply or plies of said tube. Lower blade 3 2, as illustrated, has acuttinor edge parallel with its axis of revolution wiereby all of teeth47 pass into action at the same time and successively perforate andsever the ortions of the tube lying below float F. Xs the curvature ofblade 38 is rearward toward the middle thereof, the upper ply of thepaper tube has a similar rearwardly-reaching curved line of severance,while the lower ply thereof has a straight line of severance. Theforward edge of the upper ply being thus cut back toward the middleportion 'thereof leaves the forward part of the lower rly exposed to beconveniently gripped wit out involving the upper ply. In most cases thesuccessive operations of the upper and lower blades, respectively, willentirely sever the advanced section of paper tube from the main webthereof, and the o eration of my improved machine be there y completedat this point; but occa- SOHally Vlth 9l`il}kinds pfpaperjf blades32.38are not carefully adusted one'omi of the edges of the flat tubewhere said edges 6o by 'rolls 1 1 12between tension members Q'Zj,

lie around the lateral edges, respectively, of float F will not be competely severed. In such cases as the partly-severed section is fedthereon, respectively` s-llwmm will be momentarily Md1 "i ardatanltaryCutter, Notchcd Work- 8'18713 "v rmain tube-section is rigidly held byrolls 7 8, this take-up action of members 57 58 will result in thepulling apart of any filaments of paper left uncut by blades 32 38, andthereby cobmplete the operation of severing the paper tu e.

Various profiles of severance of either the upper or lower plies of thepaper tube may be had by forming one or both of blades 32 38 tocorrespond with such desired rofiles. Always, however, the severanceinesmust at least approximately meet at each side of the flat tube, so asnot to leave an excessive amount of aper to be severed by the tensionmeans. I it is desired to sever a continuous web passing over the upperface only of fioat F, knife 32 and roll 25 may be omitted.

I claim- 1. A float having a plurality of contiguous grooves lengthwisein one face thereof, said grooves being of a depth less than thethickness of the float, a rotatable blade above the float, said bladehaving a plurality of teeth for engagement With the groovesrespectively, in the oat, all combined and working togethersubstantially as described.

2. The combination of a iioat having a plurality of grooves lengthwisein one face thereof, said grooves being of a depth less than thethickness of the float, a rotatable blade having its axis substantiallyat right angles to the length of the float, said blade aving teeth forengagement with each groove respectively of the lioat, `all combined andoperating together substantially as described.

3. A float having a plurality of contiguous grooves len thwise in oneface thereof, a rotatable bla e above the float, said blade having atransverse profile other than a straight line, and having a plurality ofteeth for engagement with the grooves respectively in the float, allcombined and working together substantially as described.

4. A float, having a plurality of contiguous grooves lengthwise in eachside thereof, said grooves being of a depth less than the thickness ofthe float and sufficient in number to extend substantially the width ofeach side of said float, a rotatable blade above the float, said bladehaving a plurality of teeth for en a ement with the grooves in the upperside o t e float and a rotatable blade below -the fioat, said bladehaving a plui xlity of IOO IIO

width of each side of said float, a rotatable blade above the float,said blade having teeth for engagement with each groove respectively inthe upper side of the float and a rotatable blade below the float, saidblade having teeth for engagement with each grooverespectively in thelower side of the float, and means to maintain the oat for engagementwith said blades, all combined and operating together substantially asdescribed.

6. The combination of a float having a plurality of contiguous grooveslengthwise in each side thereof, the grooves in one side of the oatbeing so disposed as not to penetrate the grooves in the other side ofthe float, a rotatable roll above the float said roll having a pluralityof teeth for engagement withthe grooves in the upper side of the fioat,and a rotatable roll below the float said roll having a plurality ofteeth for engagement with the grooves in the lower side of the float,all combined and operating together substantially as described.

7. The combination of a float having a series of lengthwise groovescrosswise in one face thereof,- the adjacent edges of said groovescontacting with each other respectively on the face of the float, arotatable blade having a cutting edge complementary to the cross-sectionprofile of the series of grooves means for feedi mpaper lengthwise onthe fab'erofthefldat'ld means to rotate the blade at a cutting-edge seed 1n excess of t u--a o e aereem meansa combine an operating togethersubstantially as described.

8. The combination of a oat having a plurality of contiguous V-grooves,lengthwise in one face thereof said grooves having a longitudinalprofile conforming to the arc of a circle, a rotatable blade above thefloat7 said blade having a plurality of teeth complementary to and forengagement with the grooves in the float the teeth of said blade havinga radius of rotation less than the radius of the longitudinal profile ofthe grooves all combined and operating together substantially asdescribed.

9. The combination of a float having a plurality of grooveslengthwise inone face thereof, said gr'oves being of a depth less than the thicknessof the float and of such cross-section profile and so spaced thatadjoining grooves will contact with each other respectivelyfr'i the faceof the float, a rotatable blade above the float said blade having aplurality of teeth' for engagement with the grooves respectively, in thefloat all combined and operating together substantially aff. described.f

10. The combination of a float having a plurality of grooves lengthwisein one face thereof, said grooves being of a depth less than thethickness of said float and of such cross-section profile and so spacedthat their adjoining edges are in contact on the face of the float, arotatable blade above the ioat said blade having a cutting-profilecomplementary to the cross-section profile of the series of grooveswhereby a continuous line \of coaction is attained within thellimits ofthe engagement of the grooves and the rotagether substantially asdescribed.

11. A float having a plurality of contiguous grooves lengthwise in eachside thereof, a rotatable blade above the float, said blade having aplurality of teeth for engagement with the vgrooves in the upper side ofthe float, a rotatable blade below the float, said blade having aplurality of teeth for engagement with the grooves in the lower side ofthe fioat, means for feeding paper lengthwise on each side of the oat,means for rotating the blades to cause the teeth thereof to travel at alinear speed in excess of the speed of the paper-feeding means and meansto maintain the oat for engagement with the blades, all combined and oerating together substantially as described.

12. A float having a plurality of contiguous grooves lengthwise in oneface thereof, a rotatable blade above the float, said blade having atransverse profile other than a straight line and having a plurality ofteeth in the float, means for feeding paper lengthwise on the face ofthe float and means to rotate the blade to cause the teeth thereof totravel at a linear speed in excess of the speed of the paper-feedingmeans all combined and operating together substantially as described.

13. The combination of a float having a plurality of grooves lengthwisein one face thereof, a rotatable blade above'the float, said bladehaving a plurality of teeth for engagement with the grooves respectivelyin the float, means for feeding the paper over the float to the bladeand mea for feeding the paper away from thveluiemeed.m'iarilygreater'tlan that of the fee to an efting tothe blade, allv comme gether substantially as described.

plurality of grooves lengthwise therein, a rotatable blade above thefloat, said blade having a plurality of teeth for engagement with -thegrooves respectively, in the float, means for feeding paper lengthwiseon the face of the float and means to rotate the blade at a cutting-edgelspeed in excess of the speed of the paper-feeding means, all combinedand operating together substantially as described.

15. The combination of a float having a plurality of grooves lengthwisein one face thereof, said grooves being of a depth .less than thethickness of said float, a rotatable blade above the float, said bladehaving a table blade all combined and operating tofor engagement withthe grooves respectively 14:. The combination of a float having a.

Signed this 31st day of March, 1905, at New York, N. Y., in the presenceof two subseribing witnesses.

CHARLES F. SMITH. Witnesses:

JNO. J. MURRAY, GEO. J. THOMPSON.

